Difference between revisions of "Field Guide/Birds/Branta canadensis"

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:''For the Canadian outerwear manufacturer '''Canada Goose''' see [[Canada Goose (clothing)]]''
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{{Bird id
 
 
{{Taxobox
 
| color = pink
 
 
| name = Canada Goose
 
| name = Canada Goose
| status = LC
+
| latin_name = Branta canadensis
| image = Branta-canadensis-004.jpg
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| level = 4
| image_width = 240px
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| image_1 = Canada-Goose-Szmurlo.jpg| image_width = 240px
| regnum = [[Animal]]ia
+
| caption_1 = Canada Goose in flight
| phylum = [[Chordate|Chordata]]
+
| image_2 = Wildgans-schwarzer-kopf-fuerth.jpg
| classis = [[bird|Aves]]
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| caption_2 = Breeding pair
| ordo = [[Anseriformes]]
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| image_3 = Branta canadensis1.jpg
| familia = [[Anatidae]]
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| caption_3 = Female with goslings
| genus = '''''[[goose|Branta]]'''''
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| range_map = Branta canadensis map.png
| species = '''''B. canadensis'''''
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| call = Branta canadensis.ogg
| binomial = ''Branta canadensis''
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| description = The '''Canada Goose''' (''Branta canadensis'') belongs to the ''Branta'' genus of geese, which contains species with largely black plumage, distinguishing them from the grey species of the ''Anser'' genus.
| binomial_authority = ([[Carolus Linnaeus|Linnaeus]], [[1758]])
 
| subdivision_ranks = [[Subspecies]]
 
| subdivision =
 
* ''B. c. occidentalis'' <small>([[Dusky Canada Goose]])</small>
 
* ''B. c. fulva'' <small>([[Vancouver Canada Goose]])</small>
 
* ''B. c. parvipes'' <small>([[Lesser Canada Goose]])</small>
 
* ''B. c. moffitti'' <small>([[Moffitt's Canada Goose]])</small>
 
* ''B. c. maxima'' <small>([[Giant Canada Goose]])</small>
 
* ''B. c. interior'' <small>([[Interior Canada Goose]])</small>
 
* ''B. c. canadensis'' <small>([[Atlantic Canada Goose]])</small>
 
}}
 
 
 
The '''Canada Goose''' (''Branta canadensis'') belongs to the ''Branta'' [[genus]] of [[goose|geese]], which contains [[species]] with largely black plumage, distinguishing them from the grey ''Anser'' species.
 
 
 
The species name, ''canadensis'', is a [[New Latin]] word meaning "of [[Canada]]".
 
 
 
==Appearance==
 
[[Image:Canada goose gosling - natures pics.jpg|thumb|200px|left|Yellow plumage of gosling]]
 
 
 
The black head and neck with white "chinstrap" distinguish this goose from all except the [[Barnacle Goose]], but the latter has a black breast and grey, rather than brownish, body plumage. There are seven [[subspecies]] of this bird, of varying sizes and plumage details, but all are recognizable as Canada Geese. Some are hard to distinguish from the [[Cackling Goose]] (''Branta hutchinsii''), with which the Canada Goose was long assumed to form one species, and the name Lesser Canada Goose is, confusingly, often applied to ''B. hutchinsii''.
 
 
 
This species is 90-100 cm long with a 160-175 cm wing span. Males weigh 3.5&ndash;6.5 kg, (8&ndash;14 pounds ), and can be very aggressive in defending territory. The female looks virtually identical but is slightly lighter at 3&ndash;5.5 kg (7&ndash;12 pounds), and has a different honk
 
 
 
==Behaviour and habitat==
 
[[Image:Canada goose head detail.JPG|thumb|left|200px|Specialized for plant feeding]]
 
[[Image:Canada Goose Creche.JPG|thumb|right|200px|Example of a creche]]
 
[[Image:Canada goose parade.JPG|thumb|right|200px|Example of a parade]]
 
These birds feed mainly on plant material. When feeding in water, they submerge their heads and necks to reach aquatic plants, sometimes tipping forward like a [[dabbling duck]]. Flocks of these birds often feed on leftover cultivated grains in fields, especially during migration or in winter.
 
 
 
During the second year of their lives, Canada Geese find themselves a mate. Most couples stay together all of their lives. If one is killed, the other may find a new mate, and divorce also occurs, though rarely.<ref>Bruce Bagemihl, ''Biological Exuberance: Animal Homosexuality and Natural Diversity,'' St. Martin's Press, 1999; p.485</ref> The female lays 4-8 eggs and both parents protect the nest while the eggs incubate, but the female spends more time at the nest than the male. During that time, they lose their flight feathers, so that they cannot fly until after their eggs hatch. This period lasts for 25-28 days.
 
 
 
In some populations, up to 12% of the pairs are [[Animal sexuality|‎homosexua]]l. Both males and females may form same-sex pairs. One study has observed that 18% of the males formed same-sex pair bonds, while for females the ratios varied between 6 and 12%. Courtship behavior is associated with such couples, though copulation is not a prominent feature of same-sex pairs.<ref>Bruce Bagemihl, ''Biological Exuberance: Animal Homosexuality and Natural Diversity,'' St. Martin's Press, 1999; pp.483-485</ref>
 
 
 
Adult geese are often seen leading their goslings in a line with one parent at the front, and the other at the back of the "parade". While protecting their young, parents often violently chase away nearby creatures, from small blackbirds to other geese, to humans that approach.  However, geese may form groups of a number of goslings and a few adults, called crèches. The young do not leave their parents until after the spring migration, when they return to their birthplace.
 
 
 
This well-known species is native to [[North America]]. It breeds in [[Canada]] and the northern [[United States|USA]] in a variety of habitats. However, the nest is usually located in an elevated area near water, sometimes on a [[American Beaver|beaver]] lodge. The eggs are laid in a shallow depression lined with plant material and down.  The [[Great Lakes]] region maintains a very large population of Canada Geese.
 
 
 
Like most geese, it is naturally [[bird migration|migratory]], the wintering range being most of the USA. The calls overhead from large groups of Canada Geese flying in V-shaped formation signal the transitions into spring and autumn. In some areas, migration routes have changed due to changes in habitat and food sources. In mild climates, such as the Pacific Northwest, due to a lack of former predators, some of the population has become non-migratory.
 
 
 
Some migratory populations in temperate climates frequent cities as well, due to convenient, predator-free open spaces. These birds are considered by many to be a nuisance, mainly because of the large volume of [[feces]] they produce, and like other water fowl, they also frequently walk with their young across roads, creating traffic tie-ups. Some cities have begun extermination programs against them.  Other solutions have included relocation and the use of a substance to coat the eggs to prevent maturation and hatching.  Many geese are also killed in collisions with automobiles and, occasionally, aircraft.
 
 
 
If a goose feels threatend by another creature it will usually warn the creature by giving off a hissing sound
 
 
 
==Other locations==
 
[[Image:Branta canadensis map.png|thumb|220px|''Branta canadensis'' Canada Goose distribution: yellow:summer; blue:winter; green:year-round]]
 
Canada Geese have reached western [[Europe]] naturally, as has been proved by [[Bird ringing|ringing recoveries]]. The birds are of at least the subspecies ''parvipes'', and possibly others. Canada Geese are also found naturally on the [[Kamchatka Peninsula]] in eastern [[Siberia]], eastern [[China]], and throughout [[Japan]]. 
 
 
 
[[Image:Audubon-CanadaGoose.jpg|thumb|left|Branta canadensis, by [[John James Audubon]]]]
 
 
 
Greater Canada Geese have also been widely introduced in Europe, and have established feral populations in [[Great Britain]], [[The Netherlands]], and [[Scandinavia]]. Semi-tame [[feral]] birds are common in parks, and have become a pest in some areas. It is now proven that most Scandinavian and some British birds have established a migration pattern. The geese were first introduced in the [[United Kingdom]] as an addition to [[James II of England|King James II]]'s waterfowl collection in [[St. James's Park]]. Finally, Canada Geese were introduced as a game bird into [[New Zealand]], but they have also become a problem in some areas there.
 
 
 
By the early [[20th century]], over-hunting and loss of habitat in the late 1800s and early 1900s had resulted in a serious decline in the numbers of this bird in its native range. The Giant Canada Goose subspecies was believed to be extinct in the 1950s until, in 1962, a small flock was discovered wintering in [[Rochester, Minnesota]] by Harold Hanson of the Illinois Natural History Survey. With improved game laws and habitat recreation and preservation programs, their populations have recovered in most of their range, although some local populations, especially of the subspecies ''occidentalis'', may still be declining. They have adapted well to urban environments, especially those with well-trimmed lawns and large ponds, such as [[golf]] courses and city parks.
 
 
 
==Taxonomy==
 
[[Image:Canada goose flight cropped and NR.jpg|thumb|250px|Canada Goose in mid-flight]]
 
The [[Cackling Goose]] was originally considered to be the same species or a subspecies of the Canada Goose, but in July 2004 the [[American Ornithologists' Union]]'s Committee on Classification and Nomenclature split the two into two species, making Cackling Goose into a full species with the scientific name ''Branta hutchinsii''. The [[British Ornithologists Union]] followed suit in June 2005.
 
 
 
The AOU has divided the many associated [[subspecies]] of both animals:
 
 
 
*Canada Goose (also known as Greater Canada Goose)
 
**Atlantic Canada Goose (''Branta canadensis canadensis'')
 
**Interior Canada Goose (''Branta canadensis interior'')
 
**Giant Canada Goose (''Branta canadensis maxima'')
 
**Moffit's Canada Goose (''Branta canadensis moffitti'')
 
**Vancouver Canada Goose (''Branta canadensis fulva'')
 
**Dusky Canada Goose (''Branta canadensis occidentalis'')
 
**part of "Lesser complex" (''Branta canadensis parvipes'')
 
 
 
*Cackling Goose (also known as Lesser Canada Goose or Small Canada Goose)
 
**Richardson's Cackling Goose (''Branta hutchinsii hutchinsii'')
 
**Bering Cackling Goose  (''Branta hutchinsii asiatica'') {{StatusExtinct|when=c.[[1929]]}}
 
**Aleutian Cackling Goose  (''Branta hutchinsii leucopareia'')
 
**Small Cackling Goose (''Branta hutchinsii minima'')
 
**part of "Lesser complex" (''Branta hutchinsii taverneri'')
 
 
 
The distinctions between the two geese have led to a great deal of confusion and debate among ornithologists. This has been aggravated by the overlap between the small types of Canada Goose and larger types of Cackling Goose. The old "Lesser Canada Goose" was believed to be a partly [[hybrid]] population, with the birds named ''taverneri'' considered a mixture of ''minima'', ''occidentalis'' and ''parvipes''. In addition, it has been determined that the [[Barnacle Goose]] is a derivative of the Cackling Goose lineage, whereas the [[Hawaiian Goose]] is an insular representative of the Canada Goose.
 
 
 
==See also==
 
{{commons|Branta canadensis}}
 
*The Canada Goose was depicted on the 1986 series [[Canadian dollar|Canadian $100 note]].
 
*The [[1996]] movie ''[[Fly Away Home]]'' was about a young girl who finds and raises a brood of orphaned Canada Goslings and attempts to get them to migrate after the birds reach adulthood.
 
  
==Notes==
+
The black head and neck with white "chinstrap" distinguish this goose from all except the Barnacle Goose, but the latter has a black breast, and grey, rather than brownish, body plumage. There are seven subspecies of this bird, of varying sizes and plumage details, but all are recognizable as Canada Geese. Some are hard to distinguish from the Cackling Goose (''Branta hutchinsii''), with which the Canada Goose was long assumed to form one species; the name Lesser Canada Goose is, confusingly, often applied to ''B. hutchinsii''.
{{reflist}}
 
  
==References==
+
This species is 90-100 cm long with a 160-175 cm wing span. Males weigh {{units|3.5–6.5 kg|8–14 pounds}}, and can be very aggressive in defending territory. The female looks virtually identical but is slightly lighter at {{units|3–5.5 kg|7–12 pounds}}, and has a different honk. Exceptionally, weights of {{units|11.3 kg|25 pounds}} and a wingspan of {{units|224 cm|88 inches}} have been recorded in the largest race.
* {{IUCN2006|assessors=BirdLife International|year=2006|id=47149|title=Branta canadensis|downloaded=11 May 2006}}
 
  
== External links ==
+
These birds feed mainly on plant material. When feeding in water, they submerge their heads and necks to reach aquatic plants, sometimes tipping forward like a dabbling duck. Flocks of these birds often feed on leftover cultivated grains in fields, especially during migration or in winter.
*ARKive - [http://www.arkive.org/species/ARK/birds/Branta_canadensis/ images and movies of the Canada goose ''(Branta canadensis)'']
 
*Stackhouse, Mark. "The New Goose." [http://www.utahbirds.org/RecCom/NewGoose.htm]
 
*Angus, Wilson. "Identification and range of subspecies within the Canada and Cackling Goose Complex (''Branta canadensis'' & ''B. hutchinsii'')." [http://www.oceanwanderers.com/CAGO.Subspecies.html]
 
*Moser, Timothy J., Craven, Scott R. and Miller, Brian K. "Canada Geese in the Mississippi Flyway: A Guide for Goose Hunters and Goose Watchers" [http://www.ces.purdue.edu/extmedia/FNR/FNR-129.html]
 
*[http://www.rspb.org.uk/birds/guide/c/canadagoose/index.asp RSPB A to Z of UK Birds]
 
  
== Gallery ==
+
During the second year of their lives, Canada Geese find themselves a mate. Most couples stay together all of their lives. If one is killed, the other may find a new mate. The female lays 4-8 eggs and both parents protect the nest while the eggs incubate, but the female spends more time at the nest than the male. During that time, they lose their flight feathers, so that they cannot fly until after their eggs hatch. This period lasts for 25-28 days.
<gallery>
 
  
image:RW_IMG_3295.JPG|Spring Goslings, [[Thames Ditton]], UK
+
Adult geese are often seen leading their goslings in a line, usually with one parent at the front, and the other at the back of the "parade". While protecting their young, parents often violently chase away nearby creatures, from small blackbirds to other geese, to humans that approach, after warning them by giving off a hissing sound. The young do not leave their parents until after the spring migration, when they return to their birthplace.
image:CanadaGoslingRotherhithe.jpg| Adult and gosling
 
image:gos.jpg
 
Image:Staten Island 142.jpg
 
Image:Pbalson_20060527_IMG_3675.JPG
 
Image:Canadageeselake3.jpg|Flock on the water.
 
Image:May_27_2006_goosefamily.jpg|Breeding pair and goslings, Canada.
 
</gallery>
 
  
[[Category:Branta]]
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This well-known species is native to North America. It breeds in Canada and the northern United States in a variety of habitats. However, the nest is usually located in an elevated area near water, sometimes on a beaver lodge. The eggs are laid in a shallow depression lined with plant material and down. The Great Lakes region maintains a very large population of Canada Geese.
[[Category:Geese]]
 
[[Category:Heraldic birds]]
 
[[Category:Avifauna of Canada]]
 
[[Category:Avifauna of North America]]
 
[[Category:Migratory birds (Western hemisphere)]]
 
[[Category:Animal homosexuality]]
 
[[Category:Fauna of Scotland]]
 
  
[[bg:Канадска гъска]]
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Like most geese, the Canada goose is naturally migratory with the wintering range being most of the United States. The calls overhead from large groups of Canada Geese flying in V-shaped formation signal the transitions into spring and autumn. In some areas, migration routes have changed due to changes in habitat and food sources. In mild climates, such as the Pacific Northwest, due to a lack of former predators, some of the population has become non-migratory.
[[cy:Gŵydd Canada]]
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}}<noinclude>[[Category:Adventist Youth Honors Answer Book/Transcluded Modules|{{FULLCHAPTERNAME}}]]</noinclude>
[[da:Canadagås]]
 
[[de:Kanadagans]]
 
[[eo:Kanada ansero]]
 
[[fr:Bernache du Canada]]
 
[[ik:Iqsrabutilik]]
 
[[lt:Kanadinė berniklė]]
 
[[hu:Kanadai lúd]]
 
[[nl:Grote Canadese gans]]
 
[[ja:カナダガン]]
 
[[no:Kanadagås]]
 
[[pl:Bernikla kanadyjska]][[pt:Ganso-do-canadá]]
 
[[sl:Kanadska gos]]
 
[[fi:Kanadanhanhi]]
 
[[sv:Kanadagås]]
 
[[tr:Kanada kazı]]
 
[[zh:加拿大雁]]
 

Latest revision as of 19:10, 5 July 2012

Branta canadensis (Canada Goose)
Canada Goose in flight
Range
Breeding pair
Female with goslings
Description
The Canada Goose (Branta canadensis) belongs to the Branta genus of geese, which contains species with largely black plumage, distinguishing them from the grey species of the Anser genus.

The black head and neck with white "chinstrap" distinguish this goose from all except the Barnacle Goose, but the latter has a black breast, and grey, rather than brownish, body plumage. There are seven subspecies of this bird, of varying sizes and plumage details, but all are recognizable as Canada Geese. Some are hard to distinguish from the Cackling Goose (Branta hutchinsii), with which the Canada Goose was long assumed to form one species; the name Lesser Canada Goose is, confusingly, often applied to B. hutchinsii.

This species is 90-100 cm long with a 160-175 cm wing span. Males weigh 3.5–6.5 kg8–14 pounds, and can be very aggressive in defending territory. The female looks virtually identical but is slightly lighter at 3–5.5 kg7–12 pounds, and has a different honk. Exceptionally, weights of 11.3 kg25 pounds and a wingspan of 224 cm88 inches have been recorded in the largest race.

These birds feed mainly on plant material. When feeding in water, they submerge their heads and necks to reach aquatic plants, sometimes tipping forward like a dabbling duck. Flocks of these birds often feed on leftover cultivated grains in fields, especially during migration or in winter.

During the second year of their lives, Canada Geese find themselves a mate. Most couples stay together all of their lives. If one is killed, the other may find a new mate. The female lays 4-8 eggs and both parents protect the nest while the eggs incubate, but the female spends more time at the nest than the male. During that time, they lose their flight feathers, so that they cannot fly until after their eggs hatch. This period lasts for 25-28 days.

Adult geese are often seen leading their goslings in a line, usually with one parent at the front, and the other at the back of the "parade". While protecting their young, parents often violently chase away nearby creatures, from small blackbirds to other geese, to humans that approach, after warning them by giving off a hissing sound. The young do not leave their parents until after the spring migration, when they return to their birthplace.

This well-known species is native to North America. It breeds in Canada and the northern United States in a variety of habitats. However, the nest is usually located in an elevated area near water, sometimes on a beaver lodge. The eggs are laid in a shallow depression lined with plant material and down. The Great Lakes region maintains a very large population of Canada Geese.

Like most geese, the Canada goose is naturally migratory with the wintering range being most of the United States. The calls overhead from large groups of Canada Geese flying in V-shaped formation signal the transitions into spring and autumn. In some areas, migration routes have changed due to changes in habitat and food sources. In mild climates, such as the Pacific Northwest, due to a lack of former predators, some of the population has become non-migratory.